Cakradatta (Cikitsasangraha) 77.9

77.9

tato vrīhimukhaṃ vyadhyapradeśe nyasya pīḍayet .
aṅguṣṭhatarjanībhyāṃ tu talapracchāditaṃ bhiṣak .. 9 ..

Then, having placed the vrīhimukha instrument on the site to be punctured, the physician / should press it with thumb and forefinger, covered by the palm.